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Patent Searching and Data

Document Type and Number:
Japanese Patent JP4605605
Kind Code:

To prevent creeping start when starting an engine, and to surely stop a vehicle in a slope, in regard to a hydrostatic continuously variable transmission provided with a hydraulic servo mechanism of structure for controlling tilting of a movable swash plate connected to a piston by supplying the charge pressure through a swash plate angle control valve in order to slide the piston.

At least one of pressure receiver chambers 20a and 20b is provided with a positioning means 89 for positioning the piston 21 at a neutral position, where supply of pressure oil to the pressure receiver chambers 20a and 20b is stopped, in relation to a spool 22 positioned corresponding to the neutral position of a movable swash plate of a hydraulic pump during the time when an engine for driving the hydraulic pump for supplying pressure oil to the pressure receiver chambers 20a and 20 is stopped.


Koji Sakata
Mochizuki Yasuhisa
Application Number:
Publication Date:
January 05, 2011
Filing Date:
September 27, 2005
Export Citation:
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Yanmar Co., Ltd.
International Classes:
F16H61/423; F04B1/22; F04B1/26; F16H39/14; F16H61/40; F16H61/4069; F16H61/42; F16H61/433; F16H61/439; F16H59/74; F16H61/66
Domestic Patent References:
Attorney, Agent or Firm:
Juichiro Yano